12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > A fast large-signal model for coupled-cavity TWTS.
View graph of relations

« Back

A fast large-signal model for coupled-cavity TWTS.

Research output: Contribution to journalJournal article

Published

Journal publication date11/1988
JournalIEEE Transactions on Electron Devices
Journal number11, Pa
Volume35
Number of pages9
Pages2068-2076
Original languageEnglish

Abstract

A fast and accurate one-dimensional large-signal model for coupled-cavity TWTs has been developed that can be used interactively for the optimization of a TWT design. Different modeling techniques for enhancing the speed of the large-signal model with no loss in accuracy are discussed. It has been shown that the speed of the model can be increased by (1) suitable selection of the basic integration parameters such as the number of electron discs per RF cycle and number of integration steps per cavity, (2) choosing a suitable method of integration of the relativistic equation of motion, (3) optimizing the iteration processes through each cavity and each section, and (4) efficient calculation of the space-charge forces. The model has been tested for the low-space-charge high-efficiency NASA CTS 200-W tube and for a high-space-charge high-gain tube. The characteristics of a 58-cavity tube for a single value of input power and frequency can be computed in less than 1.5 min of CPU time on a VAX 11/785 computer. This is at least 5 to 6 times faster than the previous models with the same accuracy.

Bibliographic note

"©1988 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE." "This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder."